I have low free T3 and good free T4, no antibodies, so basically a conversion problem. Some studies have found that guggul helps, so I decided to give it a try. Now I have used it for seven weeks and for me, it works. My hands and feet are warmer, I have more energy, the bags under my eyes are gone and my stomach works without delays, to put it delicately.
Also, I have lost 8 pounds without changing anything else about my mostly Paleo lifestyle. The only thing added is the guggul. I haven't noticed any other side effects.

I take 2 capsules twice daily and within the first few days noticed incredible improvement for low thyroid. My energy level has soared and my feet no longer burn. I've used Himalaya Gugguls for 5 weeks and am so impressed with it I got my 85 year old mother on it. She says that (after 13 days of use) she feels like she's 70 years old again! You won't be disappointed!